The Evolution of Lightning Flash Density, Flash Size, and Flash Energy During Hurricane Dorian's (2019) Intensification and Weakening

Duran, Patrick; Schultz, Christopher J.; Bruning, Eric C.; Stevenson, Stephanie N.; PeQueen, David J.; Johnson, Nicholas E.; Allen, Roger E.; Smith, Matthew R.; LaFontaine, Frank J.

doi:10.1029/2020GL092067

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The Evolution of Lightning Flash Density, Flash Size, and Flash Energy During Hurricane Dorian's (2019) Intensification and Weakening

2021
By Duran, Patrick ; Schultz, Christopher J. ; Bruning, Eric C. ; ...
Source: Geophysical Research Letters, 48, e2020GL092067

[PDF-1.71 MB]

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Journal Title:

Geophysical Research Letters
Personal Author:

Duran, Patrick ; Schultz, Christopher J. ; Bruning, Eric C. ; Stevenson, Stephanie N. ; PeQueen, David J. ; ... More +

Duran, Patrick ; Schultz, Christopher J. ; Bruning, Eric C. ; Stevenson, Stephanie N. ; PeQueen, David J. ; Johnson, Nicholas E. ; Allen, Roger E. ; Smith, Matthew R. ; LaFontaine, Frank J. Less -
NOAA Program & Office:

NWS (National Weather Service) ; NHC (National Hurricane Center)

NWS (National Weather Service) ; NHC (National Hurricane Center) Less -
Description:

The two most distinct inner-core lightning outbreaks in Hurricane Dorian (2019) are analyzed using the Geostationary Lightning Mapper (GLM). The first outbreak occurred during Dorian's intensification, including a rapid intensification (RI), and the second occurred during weakening. During RI, inner-core lightning flash density increased as flashes concentrated inside of the radius of maximum wind (RMW). As weakening commenced, numerous flashes still occurred within the RMW, with a flash rate more than three times that during RI–a signal typically associated with strengthening. These flashes, however, were much smaller and less energetic than those during intensification. Evidence is presented that barotropic mixing and secondary eyewall formation increased the number of small, low-energy lightning flashes in the inner core while simultaneously weakening the storm. The results suggest that flash area and energy from GLM could help distinguish between lightning outbreaks that correspond to intensification and those that correspond to weakening.
Keywords:

[+]

Cyclones Hurricane Dorian, 2019 Hurricanes Lightning Weather Forecasting Barotropic Instability Geostationary Lightning Mapper (GLM) Radius Of Maximum Wind (RMW) Rapid Intensification Tropical Cyclones
Source:

Geophysical Research Letters, 48, e2020GL092067
DOI:

https://doi.org/10.1029/2020GL092067
Document Type:

Journal Article
Funding:

Grant no. NA14NEWS4320003 ; Grant no. NA14OAR4320125

Grant no. NA14NEWS4320003 ; Grant no. NA14OAR4320125 Less -
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Submitted
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urn:sha256:6ef87b4a5a78f485e58cbdb55743afc6c8e61ded46a16c4bf2e575a481a5616d
Download URL:

https://repository.library.noaa.gov/view/noaa/46397/noaa_46397_DS1.pdf
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The Evolution of Lightning Flash Density, Flash Size, and Flash Energy During Hurricane Dorian's (2019) Intensification and Weakening

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